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83ee3021e9
A fixed channel count makes no sense with an entity based 3D audio format like MPEG-H, because MPEG-H decoders do not simply decode; they "spatialize" the entities, meaning that said entities are decoded and rendered accordingto the needs of the target playback system and its channel count.
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* Simple Plugin API */
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/* SPDX-FileCopyrightText: Copyright © 2025 Carlos Rafael Giani */
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/* SPDX-License-Identifier: MIT */
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#ifndef SPA_AUDIO_MPEGH_UTILS_H
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#define SPA_AUDIO_MPEGH_UTILS_H
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#include <spa/pod/parser.h>
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#include <spa/pod/builder.h>
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#include <spa/param/audio/format.h>
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#include <spa/param/format-utils.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \addtogroup spa_param
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* \{
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*/
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#ifndef SPA_API_AUDIO_MPEGH_UTILS
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#ifdef SPA_API_IMPL
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#define SPA_API_AUDIO_MPEGH_UTILS SPA_API_IMPL
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#else
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#define SPA_API_AUDIO_MPEGH_UTILS static inline
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#endif
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#endif
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SPA_API_AUDIO_MPEGH_UTILS int
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spa_format_audio_mpegh_parse(const struct spa_pod *format, struct spa_audio_info_mpegh *info)
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{
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int res;
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res = spa_pod_parse_object(format,
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SPA_TYPE_OBJECT_Format, NULL,
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SPA_FORMAT_AUDIO_rate, SPA_POD_OPT_Int(&info->rate));
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return res;
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}
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SPA_API_AUDIO_MPEGH_UTILS struct spa_pod *
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spa_format_audio_mpegh_build(struct spa_pod_builder *builder, uint32_t id,
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const struct spa_audio_info_mpegh *info)
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{
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struct spa_pod_frame f;
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spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
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spa_pod_builder_add(builder,
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SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_audio),
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SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_mpegh),
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SPA_FORMAT_AUDIO_format, SPA_POD_Id(SPA_AUDIO_FORMAT_ENCODED),
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0);
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if (info->rate != 0)
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spa_pod_builder_add(builder,
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SPA_FORMAT_AUDIO_rate, SPA_POD_Int(info->rate), 0);
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return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
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}
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/**
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* \}
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*/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_AUDIO_MPEGH_UTILS_H */
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